I am sure I am not the only one that has an extra muscular clicker finger due to how many times you have to click to send multiple items to other users or buy from a user shop. I think there should be a drop down menue so that you can select the quantity you would like to send or buy. The highest you can select is however many there is in stock or in your inventory. Then, the cla-ssic "Are you sure you wish to send (example) 10 Otachi Creatu Egg(s) to ReapersPlaymate? "Yes" "Cancel". It seems like a small thing and I can deal with it the way it is, but I just think it would be more user friendly.
Edit: And I do know about the quick stock. I mean for this option to pop up when you click the item in your iventory. :3